Motion Detector Using Thingsai.io Iot Cloud Platform

In this tutorial i am going to explain about motion detection by using a PIR sensor and Esp32 along with a IOT cloud platform Thingai.io

Step 1: Components

HARDWARE COMPONENTS;

1.esp32 Development Board

2.PIR Sensor

3. Jumper Wires

SOFTWARE :

1.Arduino IDE

2. Thingsai.io account

Step 2: CONNECTIONS

The connections are quiet simple.

PIR PINS------------ESP32 PINS

VCC-------------------3V3 on esp32

GND------------------GND on esp32

OUT-------------------D22 on esp32

Step 3: CODING

Paste this code into your Arduino IDE with some updation, your Motion sensor will give the output flawlessly.

#include<WiFi.h>

#include<WiFiMulti.h>

#include<WiFiClientSecure,h>

int count=0,i,m,j,k;

int t,t1,t2,t3;

int pin = 22;

//////////////////////////////////////// ALL DECLARATIONS for CLOUD //////////////////////////////

const char* host = "api.thingsai.io"; // OR host = devapi2.thethingscloud.com

const char* post_url = "/devices/deviceData"; // OR /api/v2/thingscloud2/_table/data_ac

const char* time_server = "baas.thethingscloud.com"; //this is to convert timestamp

const int httpPort = 80;

const int httpsPort = 443;

const char* server = "api.thingsai.io"; // Server URL

char timestamp[10];

WiFiMulti WiFiMulti;

// Use WiFiClient class to create TCP connections

WiFiClient client;

/////////////////////////////////////// TIMESTAMP CALCULATION function///////////////////////////////////////

int GiveMeTimestamp()

{

unsigned long timeout = millis();

// WiFiClient client;

while (client.available() == 0)

{

if (millis() - timeout > 50000)

{

client.stop();

return 0;

}

}

while (client.available())

{

String line = client.readStringUntil('\r'); //indexOf() is a funtion to search for smthng , it returns -1 if not found

int pos = line.indexOf("\"timestamp\""); //search for "\"timestamp\"" from beginning of response got and copy all data after that , it'll be your timestamp

if (pos >= 0)

{

int j = 0;

for(j=0;j<10;j++)

{

timestamp[j] = line[pos + 12 + j];

}

}

}

}

////////////////////////////////////////////////////////////////////////////////////////////////////////

void setup()

{

Serial.begin(115200);

delay(10);

pinMode(pin,INPUT);

// We start by connecting to a WiFi network

WiFiMulti.addAP("wifi_name", "Wifi_password");

Serial.println();

Serial.println();

Serial.print("Wait for WiFi... ");

while(WiFiMulti.run() != WL_CONNECTED) {

Serial.print(".");

delay(500);

}

Serial.println("");

Serial.println("WiFi connected");

Serial.println("IP address: ");

Serial.println(WiFi.localIP());

delay(500);

}

void loop()

{

int analogValue = analogRead(outputpin);

{

/////////////////////////////////////// SEND THE QUERY AND RECEIVE THE RESPONSE///////////////////////

{

bool isDetected = digitalRead(pin);

if(isDetected){

Serial.println("Presence detected");

}

delay(500);

}

Serial.print("connecting to ");

Serial.println(host); //defined upside :- host = devapi2.thethingscloud.com or 139.59.26.117

///////////////////////////////////// TIMESTAMP CODE SNIPPET /////////////////////////

Serial.println("inside get timestamp\n");

if (!client.connect(time_server, httpPort))

{

return; //*-*-*-*-*-*-*-*-*-*

}

client.println("GET /api/timestamp HTTP/1.1"); //Whats this part doing, i didnt get

client.println("Host: baas.thethingscloud.com");

client.println("Cache-Control: no-cache");

client.println("Postman-Token: ea3c18c6-09ba-d049-ccf3-369a22a284b8");

client.println();

GiveMeTimestamp(); //it'll call the function which will get the timestamp response from the server

Serial.println("timestamp receieved");

Serial.println(timestamp);

Serial.println("inside ThingsCloudPost");

String PostValue = "{\"device_id\": 61121695839, \"slave_id\": 2";

PostValue = PostValue + ",\"dts\":" +timestamp;

PostValue = PostValue +",\"data\":{\"PIR\":" + pin +"}"+"}";

Serial.println(PostValue);

/* create an instance of WiFiClientSecure */

WiFiClientSecure client;

Serial.println("Connect to server via port 443");

if (!client.connect(server, 443)){

Serial.println("Connection failed!");

} else {

Serial.println("Connected to server!");

/* create HTTP request */

client.println("POST /devices/deviceData HTTP/1.1");

client.println("Host: api.thingsai.io");

//client.println("Connection: close");

client.println("Content-Type: application/json");

client.println("cache-control: no-cache");

client.println("Authorization: Bearer eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.IjVhMzBkZDFkN2QwYjNhNGQzODkwYzQ4OSI.kaY6OMj5cYlWNqC2PNTkXs9PKy6_m9tdW5AG7ajfVlY");

client.print("Content-Length: ");

client.println(PostValue.length());

client.println();

client.println(PostValue);

//////////////////////////////////POSTING the data on to the cloud is done and now get the response form cloud server//////////////////

Serial.print("Waiting for response ");

while (!client.available()){

delay(50); //

Serial.print(".");

}

/* if data is available then receive and print to Terminal */

while (client.available()) {

char c = client.read();

Serial.write(c);

}

/* if the server disconnected, stop the client */

if (!client.connected()) {

Serial.println();

Serial.println("Server disconnected");javascript:;

client.stop();

}

}

Serial.println("////////////////////// THE END /////////////////////");

delay(3000);

}

}

Step 4: OUTPUT

This is the bar graph representation of the values read from the sensor in the thingsai,io cloud platform,

Step 5: Graph

This is the graphical representation of the values from the sensor. From the above graph we can analyze the application of the sensor. Thank You

Step 6: Here's a Video of Breif Explanation

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